CN103108475A - High strength electric-discharge lamp electronic ballast and starting method thereof - Google Patents
High strength electric-discharge lamp electronic ballast and starting method thereof Download PDFInfo
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- CN103108475A CN103108475A CN201210296036XA CN201210296036A CN103108475A CN 103108475 A CN103108475 A CN 103108475A CN 201210296036X A CN201210296036X A CN 201210296036XA CN 201210296036 A CN201210296036 A CN 201210296036A CN 103108475 A CN103108475 A CN 103108475A
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Abstract
The invention discloses a high strength electric-discharge lamp electronic ballast which comprises an electro-magnetic interference (EMI) wave filter, a power factor correction (PFC) circuit, a BUCK depressurization circuit, a full-bridge resonance circuit, a BUCK controller and a full-bridge controller. The full-bridge resonance circuit is used for converting direct current output by the BUCK depressurization circuit into alternating current. When ignition is carried out, the full-bridge controller is arranged to control the full-bridge resonance circuit and carry out LC resonance on direct current of 150V to generate high frequency sine-wave voltage. Within certain time after a high strength electric-discharge lamp is lightened, the full-bridge controller controls the full-bridge resonance circuit to output the high frequency sine-wave voltage, and controls the full-bridge circuit to output low frequency square-wave voltage when the high strength electric-discharge lamp works normally. The invention further discloses a starting method of the high strength electric-discharge lamp electronic ballast. Due to the facts that the electronic ballast outputs the high frequency sine-wave voltage when a light source is lightened, and electronic ballast outputs the high frequency sine-wave voltage within a period of working time after the light source is lightened, light source output is very stable, any phenomenon of light flickering does not happen, and very comfortable using experience is brought to a user.
Description
Technical field
The invention belongs to the lighting electronic field, particularly a kind of high-intensity discharge lamp (comprising high-pressure sodium lamp, metal halide lamp etc.) electric ballast and starting method thereof.
Background technology
High-intensity discharge (HID---High Intensity Discharge) lamp, such as high-pressure sodium lamp (HPSL), metal halide lamp etc., because of have fabulous light efficiency (80～140lm/W) and suitable optical wavelength, and be widely used in outdoor lighting, as square, road, harbour etc.But traditional inductance type ballast exists power factor to hang down and the large shortcoming of own loss.The use of a large amount of low power factor electrical equipment can cause harmonic pollution to electrical network, has not only increased the load for generating equipment, makes for power generating equipment to be not fully utilized, and has a strong impact on the normal operation of other power consumption equipment.
The green illumination cause has advanced being widely used of electric ballast worldwide flourish.Electric ballast not only can be accomplished very high power factor (near 1), has significant energy-saving effect, and the work of can also lighting a lamp in very wide voltage range, has solved well the shortcoming of inductance type ballast.Because the power of HID lamp is much bigger with respect to fluorescent lamp, consumption is also very big, so the Application and Development of HID lamp electronic ballast has profound significance more.
The electric ballast that is used for low-power metal halide lamp damages light source then for fear of the generation of acoustic resonance phenomenon, usually selects low-frequency square-wave to drive, and driving frequency is 100Hz～400Hz.
The HID lamp electronic ballast requires comparatively strict because of field of employment and the characteristic of itself.Its basic demand is:
1) has higher power factor (〉=0.99);
2) adaptive temperature scope-20～50 ℃, and rain and snow;
3) outputing to the power of lamp must be constant;
4) be anti-electrode polarization, the electric current of lamp must be to exchange, and the anti-acoustic resonance of palpus;
5) trigger voltage of lighting a lamp of 2.5～4kV must be arranged, lamp is lighted rear high pressure and must be eliminated, and does not affect the normal operation of lamp;
6) higher power (the common people trade is 75W, and road is 250W, and the square is 400W, is up to 1000W);
7) perfect to identification and the defencive function of various faults (fault of lamp short circuit, lamp open circuit or, lamp overvoltage undesired without lamp, arc light, lamp overcurrent and circuit itself).
Output waveform by the high strength discharge lamp electronic ballast of prior art shown in Figure 1 can be found out, the starting resistor of the high strength discharge lamp electronic ballast of prior art when igniting is for shaking out the high pressure more than 3kV on the edge of 400V square wave, thereby breakdown electrode is lighted lamp.Yet, adopt the electric ballast of this sparking mode to have following problem:
1, due to the output voltage of BUCK reduction voltage circuit generally in the scope of 320V～400V, so the full-bridge resonant circuit is generally selected the withstand voltage metal-oxide-semiconductor of 500V, and the full-bridge resonant circuit is to be operated in low frequency, so the loss of full-bridge resonant circuit is almost the conducting power consumption decision by metal-oxide-semiconductor, thereby cause whole efficiency on the low side, be generally 0.88～0.9;
2, electric ballast is from the output low frequency square wave always of just starting working, and light source is inside a period of time after lighting, and light source output is unstable, brings obvious scintillation;
3, because adopt step-up transformer and resonance capacitance group to become the series connection resonance circuit, still can produce concussion on the edge when making after steady operation voltage commutation, thus the generation noise;
4, circuit for producing high voltage is discharged and recharged to assist by L, C and completes with step-up transformer, increases a lot of devices, brings the ballast cost to increase.
Summary of the invention
The purpose of this invention is to provide a kind of high strength discharge lamp electronic ballast, export unstable and obvious scintillation that cause with a period of time internal cause light source of light source after lighting that prevents high-intensity discharge lamp.
For achieving the above object, the invention provides a kind of high strength discharge lamp electronic ballast, comprising:
Be used for carrying out exchanging input filtering electromagnetic interface filter,
Be used for to the power factor of filtered alternating current proofread and correct and produce galvanic current the PFC circuit of power factor correction,
Be used for carrying out step-down, constant current is controlled and permanent power is controlled BUCK reduction voltage circuit,
Be used for the direct current of described BUCK reduction voltage circuit output be converted to alternating current the full-bridge resonant circuit, and
The full-bridge controller that is used for controlling the BUCK controller of described BUCK reduction voltage circuit and is used for controlling described full-bridge resonant circuit;
Described electromagnetic interface filter, PFC circuit of power factor correction, BUCK reduction voltage circuit and full-bridge resonant circuit are linked in sequence, and described BUCK controller is connected with described BUCK reduction voltage circuit, and described full-bridge controller is connected with described full-bridge resonant circuit;
When being configured to light a fire, described BUCK controller controls described BUCK reduction voltage circuit output 150V direct current, control described BUCK reduction voltage circuit output constant current before described high-intensity discharge lamp reaches rated power, and control described BUCK reduction voltage circuit output firm power after described high-intensity discharge lamp reaches rated power;
Control described full-bridge resonant circuit when described full-bridge controller is configured to light a fire described 150V direct current is carried out the high_frequency sine wave voltage that the generation of LC resonance is used for lighting described high-intensity discharge lamp, control described full-bridge resonant circuit output high_frequency sine wave voltage in certain hour after described high-intensity discharge lamp is lit, and control described full-bridge resonant circuit output low frequency square-wave voltage when described high-intensity discharge lamp normal operation.
As preferably, also comprise the first feedback circuit, pfc controller, the second feedback circuit and the 3rd feedback circuit, the output of described PFC circuit of power factor correction is sequentially through feeding back to described PFC circuit of power factor correction after described the first feedback circuit and pfc controller, sequentially through feeding back to described BUCK reduction voltage circuit after described the second feedback circuit and BUCK controller, the output of described full-bridge resonant circuit is sequentially through feeding back to described full-bridge resonant circuit after described the 3rd feedback circuit and full-bridge controller in the output of described BUCK reduction voltage circuit.
as preferred further, described full-bridge resonant circuit comprises: NMOS manages Q7, Q8, Q9 and Q5, and inductance T4 and capacitor C 5 and C4, wherein, Q7 is connected drain electrode and is connected the output of described BUCK reduction voltage circuit with Q9, and the source electrode of Q7 connects the drain electrode of Q8, and the source electrode of Q9 connects the drain electrode of Q5, the source ground of Q8 and Q5, T4, C5 and C4 are connected between the source electrode of the source electrode of Q7 and Q9, the grid of Q7 receives through resistance TR23 and drives the signal input, the grid of Q8 receives through resistance TR24 and drives the signal input, the grid of Q9 receives through resistance TR25 and drives the signal input, the grid of Q5 receives through resistance TR26 and drives the signal input, the source electrode of Q7 and the source electrode of Q9 receive respectively the detection signal input, series resistance TR28 between the grid of Q7 and source electrode, series resistance TR29 between the grid of Q8 and source electrode, series resistance TR32 between the grid of Q9 and source electrode, series resistance TR33 between the grid of Q5 and source electrode, tie point between T4 and C5 and the source electrode of Q9 are the output of described full-bridge resonant circuit.
Another object of the present invention is to provide a kind of starting method of high strength discharge lamp electronic ballast, exports unstable and obvious scintillation that cause with a period of time internal cause light source of light source after lighting that prevents high-intensity discharge lamp.
To achieve these goals, the invention provides a kind of starting method of high strength discharge lamp electronic ballast, described high strength discharge lamp electronic ballast comprises:
Be used for carrying out exchanging input filtering electromagnetic interface filter,
Be used for to the power factor of filtered alternating current proofread and correct and produce galvanic current the PFC circuit of power factor correction,
Be used for carrying out step-down, constant current is controlled and permanent power is controlled BUCK reduction voltage circuit,
Be used for the direct current of described BUCK reduction voltage circuit output be converted to alternating current the full-bridge resonant circuit,
And the full-bridge controller that is used for controlling the BUCK controller of described BUCK reduction voltage circuit and is used for controlling described full-bridge resonant circuit;
Described electromagnetic interface filter, PFC circuit of power factor correction, BUCK reduction voltage circuit and full-bridge resonant circuit are linked in sequence, and described BUCK controller is connected with described BUCK reduction voltage circuit, and described full-bridge controller is connected with described full-bridge resonant circuit;
During igniting, described BUCK controller is controlled described BUCK reduction voltage circuit output 150V direct current, described BUCK controller is controlled described BUCK reduction voltage circuit output constant current before described high-intensity discharge lamp reaches rated power, and described BUCK controller is controlled described BUCK reduction voltage circuit output firm power after described high-intensity discharge lamp reaches rated power;
During igniting, the described full-bridge resonant circuit of described full-bridge controller control carries out to described 150V direct current the high_frequency sine wave voltage that the generation of LC resonance is used for lighting described high-intensity discharge lamp, in certain hour after described high-intensity discharge lamp is lit, described full-bridge controller is controlled described full-bridge resonant circuit output high_frequency sine wave voltage, and described full-bridge controller is controlled described full-bridge resonant circuit output low frequency square-wave voltage when described high-intensity discharge lamp normal operation.
Compared with prior art, the present invention has following beneficial effect:
During 1, due to igniting, the voltage control of the BUCK reduction voltage circuit output of electric ballast of the present invention is at 150V, therefore the NMOS pipe of full-bridge resonant circuit can select 200V withstand voltage, and that the conducting resistance of NMOS pipe and NMOS pipe withstand voltage has is very large related, therefore the power consumption of full-bridge resonant circuit can decrease, can bring the efficient of complete machine 2～3% to improve, make overall efficiency reach 92%～95%;
2, due to electric ballast of the present invention in when the light source igniting and the thereafter operating time of one period, ballast output high_frequency sine wave voltage makes light source output highly stable, occurs without any scintillation, brings as snug as a bug in a rug experience to the user;
3, high_frequency sine wave voltage is produced by the full-bridge resonance, does not need the extra L that increases, and the C device has been simplified circuit and reduced cost;
4, owing to having removed the structure such as step-up transformer, electric ballast can not produce shake on the commutation edge of output voltage when normal operation, so can not produce noise.
Description of drawings
Fig. 1 is the output waveform figure of the high strength discharge lamp electronic ballast of prior art;
Fig. 2 is the structured flowchart of high strength discharge lamp electronic ballast of the present invention;
Fig. 3 is the circuit diagram of the BUCK reduction voltage circuit of high strength discharge lamp electronic ballast of the present invention;
Fig. 4 is the circuit diagram of the full-bridge resonant circuit of high strength discharge lamp electronic ballast of the present invention;
Fig. 5 is the starting resistor oscillogram of full-bridge resonant circuit when igniting of high strength discharge lamp electronic ballast of the present invention;
Fig. 6 is the voltage waveform of full-bridge resonant circuit when normal operation of high strength discharge lamp electronic ballast of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Figure 2, the high strength discharge lamp electronic ballast of the present embodiment comprises:
Be used for inputting to exchanging the electromagnetic interface filter 1 that (for example 220V alternating current) carries out filtering, power line is to disturb the main path that imports equipment into and spread out of equipment, pass through power line, the interference of electrical network can be imported equipment into, the normal operation of jamming equipment, the interference that same equipment produces also may be passed on electrical network by power line, disturbs the normal operation of other equipment, so in the present embodiment, the electric power incoming line place at equipment adds electromagnetic interface filter 1;
Be used for the power factor of filtered alternating current is proofreaied and correct and produced the PFC circuit of power factor correction 2 of galvanic current, it is mainly used in improving power factor and produces a stable DC bus-bar voltage, and traditional PFC circuit of power factor correction 2 is output as the direct voltage of 400V;
Be used for carrying out the BUCK reduction voltage circuit 3 that step-down, constant current control and permanent power are controlled, the circuit structure of BUCK reduction voltage circuit 3 as shown in Figure 3, in the present embodiment, BUCK reduction voltage circuit 3 adopts lower BUCK structure, be that metal-oxide-semiconductor is not on the bus voltage line, and below, such benefit be drive part VCC can with bus voltage altogether, need independent insulating power supply power supply; The operation principle of BUCK reduction voltage circuit 3 is: when starting, the control IC of BUCK reduction voltage circuit 3 gathers the BUCK voltage signal, and the output voltage of controlling BUCK reduction voltage circuit 3 is 150V; Finish when starting, HID lamp 5 preheated one-sections are after the time, and the full-bridge resonant circuit 4 of back enters the low frequency operation state, and control IC sampled power detection signal this moment, enter permanent power and control; And
be used for the direct current of described BUCK reduction voltage circuit 3 outputs is converted to the full-bridge resonant circuit 4 of alternating current, as shown in Figure 4, in the present embodiment, as preferred implementation, described full-bridge resonant circuit 4 comprises: NMOS manages Q7, Q8, Q9 and Q5, and inductance T4 and capacitor C 5 and C4, wherein, Q7 is connected drain electrode and is connected the output of described BUCK reduction voltage circuit 3 with Q9, and the source electrode of Q7 connects the drain electrode of Q8, and the source electrode of Q9 connects the drain electrode of Q5, the source ground of Q8 and Q5, T4, C5 and C4 are connected between the source electrode of the source electrode of Q7 and Q9, the grid of Q7 receives through resistance TR23 and drives the signal input, the grid of Q8 receives through resistance TR24 and drives the signal input, the grid of Q9 receives through resistance TR25 and drives the signal input, the grid of Q5 receives through resistance TR26 and drives the signal input, the source electrode of Q7 and the source electrode of Q9 receive respectively the detection signal input, series resistance TR28 between the grid of Q7 and source electrode, series resistance TR29 between the grid of Q8 and source electrode, series resistance TR32 between the grid of Q9 and source electrode, series resistance TR33 between the grid of Q5 and source electrode, tie point between T4 and C5 and the source electrode of Q9 are the output of described full-bridge resonant circuit 4,
And the full-bridge controller 41 that is used for controlling the BUCK controller 31 of described BUCK reduction voltage circuit 3 and is used for controlling described full-bridge resonant circuit 4.
Described electromagnetic interface filter 1, PFC circuit of power factor correction 2, BUCK reduction voltage circuit 3 and full-bridge resonant circuit 4 are linked in sequence, and described BUCK controller 31 is connected with described BUCK reduction voltage circuit 3, and described full-bridge controller 41 is connected with described full-bridge resonant circuit 4; Wherein,
When being configured to light a fire, described BUCK controller 31 controls described BUCK reduction voltage circuit 3 output 150V direct currents, control described BUCK reduction voltage circuit 3 output constant currents before HID lamp 5 reaches rated power, and control described BUCK reduction voltage circuit 3 output firm powers after HID lamp 5 reaches rated power;
Control 4 pairs of described 150V direct currents of described full-bridge resonant circuit when described full-bridge controller 41 is configured to light a fire and carry out the high_frequency sine wave voltage that the generation of LC resonance is used for lighting HID lamp 5, control described full-bridge resonant circuit 4 output high_frequency sine wave voltages in certain hour after HID lamp 5 is lit, and control described full-bridge resonant circuit 4 output low frequency square-wave voltages when 5 normal operation of HID lamp.
During igniting, described BUCK reduction voltage circuit output 150V direct current, 4 pairs of described 150V direct currents of described full-bridge resonant circuit carry out LC resonance and produce high_frequency sine wave voltage to light HID lamp 5; After HID lamp 5 was lit, described full-bridge resonant circuit 4 continued output high_frequency sine wave voltage within a certain period of time; At last, the output of described full-bridge resonant circuit 4 is low-frequency square-wave voltage by the high_frequency sine wave voltage transitions.
in the present embodiment, as preferred implementation, also comprise the first feedback circuit, pfc controller 21, the second feedback circuit, with the 3rd feedback circuit, the output of described PFC circuit of power factor correction 2 is sequentially through feeding back to described PFC circuit of power factor correction 2 after described the first feedback circuit and pfc controller 21, the output of described BUCK reduction voltage circuit 3 is sequentially through feeding back to described BUCK reduction voltage circuit 3 after described the second feedback circuit and BUCK controller 31, the output of described full-bridge resonant circuit 4 is sequentially through feeding back to described full-bridge resonant circuit 4 after described the 3rd feedback circuit and full-bridge controller 41.
During due to igniting, the voltage control of BUCK reduction voltage circuit 3 outputs of the electric ballast of the present embodiment is at 150V, therefore the NMOS pipe of full-bridge resonant circuit 4 can select 200V withstand voltage, and that the conducting resistance of NMOS pipe and NMOS pipe withstand voltage has is very large related, therefore the power consumption of full-bridge resonant circuit 4 can decrease, can bring the efficient of complete machine 2～3% to improve, make overall efficiency reach 92%～95%.
The difficulty in starting problem of bringing because of the reduction of the voltage of BUCK reduction voltage circuit 3 outputs in order to improve, in the electric ballast of the present embodiment, full-bridge resonant circuit 4 adopts the full-bridge resonance manner, the 150V direct voltage produces high-frequency and high-voltage through LC resonance and goes a bright light source, and the ignition voltage waveform as shown in Figure 5.This sparking mode has solved the problem of OCV requirement and extra circuit for producing high voltage simultaneously, has reduced the components and parts usage quantity, has improved efficient and reliability.
After light source igniting, electric ballast continues to use high_frequency sine wave to remove driving light source, by the time after light tube electric voltage reaches certain value, then switch to low-frequency square-wave work, can eliminate like this low-frequency square-wave fully and start the unstable scintillation that causes of initial stage light output of bringing; Simultaneously because removed the structure such as step-up transformer, electric ballast can not produce shake on the commutation edge of output voltage when normal operation, so can not produce noise.The voltage waveform of electric ballast output when 5 normal operation of HID lamp as shown in Figure 6.
The operating state of the full-bridge resonant circuit 4 of the electric ballast of the present embodiment can comprise following three phases:
When 1, starting, full-bridge resonant circuit 4 output high-frequency ac voltages, frequency is swept to 25kHz downwards from 100kHz, produce three resonance by T4 and C5, C4, at the high pressure of HID lamp 5 two ends generation 3KV, puncture the electrode of HID lamp 5, light HID lamp 5, the ignition voltage waveform as shown in Figure 5;
2, after lighting HID lamp 5, full-bridge still works on the frequency of 25kHz, and HID lamp 5 is operated in constant-current phase, and HID lamp 5 power are in continuous rising;
3, when the 5 process constant current power per liter stages of HID lamp, HID lamp 5 power stabilities rise, at this moment full-bridge resonant circuit 4 enters the low-frequency square-wave operating state, the square wave of full-bridge output 100Hz, frequency is very low, due to the frequency of acoustic resonance generally between 30Hz～50kHz, so HID lamp 5 can not produce the acoustic resonance phenomenon, can not glimmer yet, the work that HID lamp 5 can be stable, the normal working voltage waveform is as shown in Figure 6.
An alternative embodiment of the invention also provides a kind of starting method of high strength discharge lamp electronic ballast, and described high strength discharge lamp electronic ballast comprises:
Be used for carrying out exchanging input filtering electromagnetic interface filter,
Be used for to the power factor of filtered alternating current proofread and correct and produce galvanic current the PFC circuit of power factor correction,
Be used for carrying out step-down, constant current is controlled and permanent power is controlled BUCK reduction voltage circuit,
Be used for the direct current of described BUCK reduction voltage circuit output be converted to alternating current the full-bridge resonant circuit,
And the full-bridge controller that is used for controlling the BUCK controller of described BUCK reduction voltage circuit and is used for controlling described full-bridge resonant circuit;
Described electromagnetic interface filter, PFC circuit of power factor correction, BUCK reduction voltage circuit and full-bridge resonant circuit are linked in sequence, and described BUCK controller is connected with described BUCK reduction voltage circuit, and described full-bridge controller is connected with described full-bridge resonant circuit;
During igniting, described BUCK controller is controlled described BUCK reduction voltage circuit output 150V direct current, described BUCK controller is controlled described BUCK reduction voltage circuit output constant current before described high-intensity discharge lamp reaches rated power, and described BUCK controller is controlled described BUCK reduction voltage circuit output firm power after described high-intensity discharge lamp reaches rated power;
During igniting, the described full-bridge resonant circuit of described full-bridge controller control carries out to described 150V direct current the high_frequency sine wave voltage that the generation of LC resonance is used for lighting described high-intensity discharge lamp, in certain hour after described high-intensity discharge lamp is lit, described full-bridge controller is controlled described full-bridge resonant circuit output high_frequency sine wave voltage, and described full-bridge controller is controlled described full-bridge resonant circuit output low frequency square-wave voltage when described high-intensity discharge lamp normal operation.
In the starting method of the present embodiment, the operating state of the full-bridge resonant circuit of electric ballast can comprise following three phases:
When 1, starting, full-bridge resonant circuit output high-frequency ac voltage, frequency is swept to 25kHz downwards from 100kHz, by the high pressure of LC resonance at HID lamp two ends generation 3KV, punctures the electrode of HID lamp, lights the HID lamp;
2, after lighting the HID lamp, full-bridge still works on the frequency of 25kHz, and the HID lamp is operated in constant-current phase, and HID lamp power is in continuous rising;
3, when the HID lamp process constant current power per liter stage, HID lamp power stability rises, at this moment the full-bridge resonant circuit enters the low-frequency square-wave operating state, the square wave of full-bridge output 100Hz, frequency is very low, due to the frequency of acoustic resonance generally between 30Hz～50kHz, so the HID lamp can not produce the acoustic resonance phenomenon, can not glimmer yet, the work that the HID lamp can be stable.
During due to igniting, the voltage control of the BUCK reduction voltage circuit output of electric ballast is at 150V, therefore the NMOS pipe of full-bridge resonant circuit can select 200V withstand voltage, and that the conducting resistance of NMOS pipe and NMOS pipe withstand voltage has is very large related, therefore the power consumption of full-bridge resonant circuit can decrease, can bring the efficient of complete machine 2～3% to improve, make overall efficiency reach 92%～95%.
The difficulty in starting problem of bringing because of the reduction of the voltage of BUCK reduction voltage circuit output in order to improve, in the electric ballast of the present embodiment, the full-bridge resonant circuit adopts the full-bridge resonance manner, and the 150V direct voltage produces high-frequency and high-voltage through LC resonance and goes a bright light source.This sparking mode has solved the problem of OCV requirement and extra circuit for producing high voltage simultaneously, has reduced the components and parts usage quantity, has improved efficient and reliability.
After light source igniting, electric ballast continues to use high_frequency sine wave to remove driving light source, by the time after light tube electric voltage reaches certain value, then switch to low-frequency square-wave work, can eliminate like this low-frequency square-wave fully and start the unstable scintillation that causes of initial stage light output of bringing; Simultaneously because removed the structure such as step-up transformer, electric ballast can not produce shake on the commutation edge of output voltage when normal operation, so can not produce noise.
Above embodiment is only exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection range, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (4)
1. high strength discharge lamp electronic ballast comprises:
Be used for carrying out exchanging input filtering electromagnetic interface filter,
Be used for to the power factor of filtered alternating current proofread and correct and produce galvanic current the PFC circuit of power factor correction,
Be used for carrying out step-down, constant current is controlled and permanent power is controlled BUCK reduction voltage circuit,
Be used for the direct current of described BUCK reduction voltage circuit output be converted to alternating current the full-bridge resonant circuit, and
The full-bridge controller that is used for controlling the BUCK controller of described BUCK reduction voltage circuit and is used for controlling described full-bridge resonant circuit;
Described electromagnetic interface filter, PFC circuit of power factor correction, BUCK reduction voltage circuit and full-bridge resonant circuit are linked in sequence, and described BUCK controller is connected with described BUCK reduction voltage circuit, and described full-bridge controller is connected with described full-bridge resonant circuit; It is characterized in that,
When being configured to light a fire, described BUCK controller controls described BUCK reduction voltage circuit output 150V direct current, control described BUCK reduction voltage circuit output constant current before described high-intensity discharge lamp reaches rated power, and control described BUCK reduction voltage circuit output firm power after described high-intensity discharge lamp reaches rated power;
Control described full-bridge resonant circuit when described full-bridge controller is configured to light a fire described 150V direct current is carried out the high_frequency sine wave voltage that the generation of LC resonance is used for lighting described high-intensity discharge lamp, control described full-bridge resonant circuit output high_frequency sine wave voltage in certain hour after described high-intensity discharge lamp is lit, and control described full-bridge resonant circuit output low frequency square-wave voltage when described high-intensity discharge lamp normal operation.
2. high strength discharge lamp electronic ballast according to claim 1, it is characterized in that, also comprise the first feedback circuit, pfc controller, the second feedback circuit and the 3rd feedback circuit, the output of described PFC circuit of power factor correction is sequentially through feeding back to described PFC circuit of power factor correction after described the first feedback circuit and pfc controller, the output of described BUCK reduction voltage circuit is sequentially through feeding back to described BUCK reduction voltage circuit after described the second feedback circuit and BUCK controller, the output of described full-bridge resonant circuit is sequentially through feeding back to described full-bridge resonant circuit after described the 3rd feedback circuit and full-bridge controller.
3. high strength discharge lamp electronic ballast according to claim 1 and 2, is characterized in that, described full-bridge resonant circuit comprises: NMOS manages Q7, Q8, Q9 and Q5, and inductance T4 and capacitor C 5 and C4, wherein, Q7 is connected drain electrode and is connected the output of described BUCK reduction voltage circuit with Q9, and the source electrode of Q7 connects the drain electrode of Q8, and the source electrode of Q9 connects the drain electrode of Q5, the source ground of Q8 and Q5, T4, C5 and C4 are connected between the source electrode of the source electrode of Q7 and Q9, the grid of Q7 receives through resistance TR23 and drives the signal input, the grid of Q8 receives through resistance TR24 and drives the signal input, the grid of Q9 receives through resistance TR25 and drives the signal input, the grid of Q5 receives through resistance TR26 and drives the signal input, the source electrode of Q7 and the source electrode of Q9 receive respectively the detection signal input, series resistance TR28 between the grid of Q7 and source electrode, series resistance TR29 between the grid of Q8 and source electrode, series resistance TR32 between the grid of Q9 and source electrode, series resistance TR33 between the grid of Q5 and source electrode, tie point between T4 and C5 and the source electrode of Q9 are the output of described full-bridge resonant circuit.
4. the starting method of a high strength discharge lamp electronic ballast, described high strength discharge lamp electronic ballast comprises:
Be used for carrying out exchanging input filtering electromagnetic interface filter,
Be used for to the power factor of filtered alternating current proofread and correct and produce galvanic current the PFC circuit of power factor correction,
Be used for carrying out step-down, constant current is controlled and permanent power is controlled BUCK reduction voltage circuit,
Be used for the direct current of described BUCK reduction voltage circuit output be converted to alternating current the full-bridge resonant circuit,
And the full-bridge controller that is used for controlling the BUCK controller of described BUCK reduction voltage circuit and is used for controlling described full-bridge resonant circuit;
Described electromagnetic interface filter, PFC circuit of power factor correction, BUCK reduction voltage circuit and full-bridge resonant circuit are linked in sequence, and described BUCK controller is connected with described BUCK reduction voltage circuit, and described full-bridge controller is connected with described full-bridge resonant circuit;
It is characterized in that,
During igniting, described BUCK controller is controlled described BUCK reduction voltage circuit output 150V direct current, described BUCK controller is controlled described BUCK reduction voltage circuit output constant current before described high-intensity discharge lamp reaches rated power, and described BUCK controller is controlled described BUCK reduction voltage circuit output firm power after described high-intensity discharge lamp reaches rated power;
During igniting, the described full-bridge resonant circuit of described full-bridge controller control carries out to described 150V direct current the high_frequency sine wave voltage that the generation of LC resonance is used for lighting described high-intensity discharge lamp, in certain hour after described high-intensity discharge lamp is lit, described full-bridge controller is controlled described full-bridge resonant circuit output high_frequency sine wave voltage, and described full-bridge controller is controlled described full-bridge resonant circuit output low frequency square-wave voltage when described high-intensity discharge lamp normal operation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677951A (en) * | 2019-09-24 | 2020-01-10 | 华南理工大学 | Full-bridge resonant circuit for ultra-high pressure mercury lamp and control method |
| CN113242624A (en) * | 2021-05-25 | 2021-08-10 | 苏州纽克斯电源技术股份有限公司 | Activation control circuit of metal halide lamp and metal halide lamp electronic ballast |
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| CN202750319U (en) * | 2012-08-17 | 2013-02-20 | 孝感锐泰照明电器有限公司 | Electronic ballast for high-strength discharge lamp |
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| CN101772248A (en) * | 2010-03-04 | 2010-07-07 | 唐礼言 | General constant-power electronic ballast for high-intensity gas discharge lamp |
| CN202750319U (en) * | 2012-08-17 | 2013-02-20 | 孝感锐泰照明电器有限公司 | Electronic ballast for high-strength discharge lamp |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110677951A (en) * | 2019-09-24 | 2020-01-10 | 华南理工大学 | Full-bridge resonant circuit for ultra-high pressure mercury lamp and control method |
| CN110677951B (en) * | 2019-09-24 | 2023-12-08 | 华南理工大学 | Full-bridge resonant circuit for ultra-high pressure mercury lamp and control method |
| CN113242624A (en) * | 2021-05-25 | 2021-08-10 | 苏州纽克斯电源技术股份有限公司 | Activation control circuit of metal halide lamp and metal halide lamp electronic ballast |
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Application publication date: 20130515 |